Well sure. While the regular ensemble teacher struggles with "do[ing] it better" and "try[ing] to understand how it works", if they keep trying this in their ensemble they will lose the students and lose their job. Keep it moving and don't make your mistakes hinder the students any more then necessary.
Where is this "mistake", BOB?
In your own practice and/or teaching?
I don't see any mistakes, myself.
Not in this situation.
I know what works and what doesn't, on long and consistent experience.
Otherwise it's like if I try to hit a note above my range during a jazz solo. The audience ain't going to stay and listen if I just keep trying to hit that note over and over. What's more important, hitting that note or playing a good solo? Miss the note? Forget about it and play that solo.
Take the chance.
No risk, no gain.
That's my philosophy, anyway.
How have I not backed my posiition up?
In my own life and career. And
on the net. Do a search. I'm nothing if not "backed up."
Over and over and over again.
My stuff works.